docs: def munge(self, k, v):
          """Turn a key and value into a dictionary describing a widget to show"""
          if '_config' in self.proxy and k in self.proxy['_config']:
              config = self.proxy['_config'][k].unwrap()
          else:
              config = default_cfg
          return {
              'key': k,
              'reg': self._reg_widget,
              'unreg': self._unreg_widget,
              'gett': self.proxy.__getitem__,
              'sett': self.set_value,
              'listen': self.proxy.connect,
              'unlisten': self.proxy.disconnect,
              'config': config
          }